Q1. What happens when you open up a browser and type a URL to request a Web page or RESTFul web service data? A1. HTTP is a stateless protocol on…
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Home › Java & Big Data Interview Q&As › ➡ Java interview › 16+ Java Key Areas Q&As › Key Area - Debugging › Archive for Key Area – Debug JEE
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Chrome Postman to test and debug RESTful Web Services
Step 1 You need to get the Postman extension for the Google chrome browser.
Step 2 Search and add POSTMAN.
Step 3 Once installed, open it from the Apps link.
Step 4 Set the TEST URL, HTTP headers (especially the content type application/json, etc), and HTTP method (GET, POST, PUT, etc) and then click on send.…
Debugging connection refused issues in Java with 9 tips
Possible reasons for “refused connections” 1) Client & Server are not connected by the LAN. For example, they can be in the different zones. 2) The Server might not be…
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Debugging java.security.cert.CertificateException: Certificates do not conform to algorithm constraints
Why? You may have a certificate with SHA1RSA key size less than 1024 bits or you have a certificate in your chain that uses MD2RSA.
Explanation? MD2 was widely recognized as insecure and thus disabled in Java in version JDK 7 onwards. If you check the “java.security” file under “$JAVA_HOME/jre/lib/security”, you will see a line as shown below.…
Debugging SSL issues in Java & tools to debug
Q1. What are some of the issues you encounter with SSL handshake? A1. Some of the issues you try to debug are Presence of a valid certificate in trust store…
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